<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
    <title>JSP - Hello Lib</title>
</head>
<body>
<h1>您好，请先登录</h1>
<form action="/user/signIn" method="post">
    <input type="text" name="username" placeholder="Username">
    <br>
    <input type="password" name="password" placeholder="Password">
    <br>
    <input type="submit" value="sign in">
    <a href="sign_up.jsp">没账号？ 注册一个</a>
</form>
<br/>

</body>
</html>